So if I understand correctly, they could use the same approach when updating to do what they really ought to -- use bcrpyt? As a result the very oldest pwds wo

So if I understand correctly, they could use the same approach when updating to do what they really ought to -- use bcrpyt? As a result the very oldest pwds would be thrice encoded -- from unsalted MD5 to salted SHA-512, and run that through bcrpyt?